汞在春小麦植株中的富集及转移规律研究

Study on Enrichment and Transfer of Mercury in Spring Wheat under Mercury Stress

为了明确汞(Hg)在小麦植株中的吸收和转运规律,采用盆栽试验,研究了Hg胁迫下重金属Hg在春小麦中的分布、富集及转移规律。结果表明,Hg迁移速率较慢,Hg胁迫下,根对Hg的富集吸收于春小麦生育期结束还未达到峰值。春小麦吸收的Hg大部分积累在根中,仅极少部分转移至叶和茎,未发现转移至籽粒。小麦根对Hg的富集能力较强,根中Hg积累量与土壤中Hg含量呈显著正相关(R2=0.9499,P<0.05);籽粒中Hg含量与土壤中Hg含量无明显相关性。

A pot experiment was conducted to study the distribution,accumulation and transfer of mercury（Hg） in spring wheat under Hg stress.The transfer rate of Hg was low,the root Hg content hadn＇t peaked at the end of the growth period of spring wheat.The Hg accumulation of spring wheat was largely deposited in root,and barely transported to leaves,stems and seeds.The enrichment capacity for mercury of wheat root was large.There was a significant correlation between the Hg contents in wheat root and soil（R2=0.9499,P0.05）;the Hg content in wheat seed was not correlated with the Hg contents in soil.